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  • The decreasing order of basicity of the following amines is : <d

The decreasing order of basicity of the following amines is :

Option: 1

(I)>(III)>(IV)>(II)


Option: 2

(II)>(III)>(IV)>(I)


Option: 3

(III)>(I)>(II)>(IV)

 


Option: 4

(III)>(II)>(I)>(IV)


Answers (1)

best_answer

Basic strength depends upon the availability of lone pairs. Greater the resonance of lone pairs lesser the basic strength.

In (III) and (II), the lone pairs are available, But nitrogen in III is sp3 and in II is sp2. So, III will have more basic strengths than II due to s-character.

In IV lone pair is not available due to aromatic resonance in the ring. it will be the least basic.

In I, the lone pair is in resonance with the benzene group. It will be less basic than II and III.

The decreasing order of basicity of the following amines is : 

III > II > I > IV

Hence, option number (4) is correct.

Posted by

Devendra Khairwa

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